Datasets Export Roundtrip

{
  "data": {
    "inputHash": "sha256:5cd80688aa0222ed8ce498bbbc048853b8a0cf640c1023236a4b3e60c…",
    "limitations": [
      "Schema and integrity checks do not certify scientific truth, com…"
    ],
    "productId": "dataset-export-roundtrip-check",
    "receiptDigest": "sha256:222ae6c0b22379467556fea28d83af13f0196d78bd86dcdd95926e2ac…",
    "result": {
      "afterDigest": "sha256:9688351800e2d1148423d83442c735ddf2baae01e4adbfe6ef53f5d1c…",
      "afterRows": 1,
      "beforeDigest": "sha256:45fa679977289675167a1e277c1febba4c59b00c64853a8462116f46f…",
      "beforeRows": 1,
      "cellValuesReturned": false,
      "changedCells": 1,
      "equalAtSamePositions": false,
      "findings": [
        {
          "column": "x",
          "kind": "type_changed",
          "rowIndex": 0
        }
      ],
      "findingsTruncated": false,
      "orderIgnored": false
    },
    "resultHash": "sha256:a6d93e19f3ff3b49a7ae4636eec65d668c55d2538f28051836505906e…",
    "version": "maha-workflow/1.0.0"
  },
  "proof": {
    "settlement_id": "0x00000000000000000000000000000000000000000000000000000000000000…"
  },
  "success": true
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://www.mahastrategies.com/api/v1/verify/datasets/export-roundtrip' \
  -H 'content-type: application/json' \
  --data-raw '{"after":[{"x":"1"}],"before":[{"x":1}],"dataClass":"synthetic"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://www.mahastrategies.com/api/v1/verify/datasets/export-roundtrip' \
  -H 'content-type: application/json' \
  --data-raw '{"after":[{"x":"1"}],"before":[{"x":1}],"dataClass":"synthetic"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.0219 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.0219" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.0219 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fwww.mahastrategies.com%2Fapi%2Fv1%2Fverify%2Fdatasets%2Fexport-roundtrip&method=POST
const res = await pay("https://www.mahastrategies.com/api/v1/verify/datasets/export-roundtrip", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "after": [
      {
        "x": "1"
      }
    ],
    "before": [
      {
        "x": 1
      }
    ],
    "dataClass": "synthetic"
  }),
});
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.0219 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.0219"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://www.mahastrategies.com/api/v1/verify/datasets/export-roundtrip",
        json={
            "after": [
                {
                    "x": "1",
                },
            ],
            "before": [
                {
                    "x": 1,
                },
            ],
            "dataClass": "synthetic",
        },
    )
    print(res.status_code, res.text)